There are 5 owner-reported brakes complaints for the 2015 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The automatic emergency braking system just goes off without any reason, causing the vehicle to considerably slow down if not stop. This happens several times a week if not multiple times a day again for no reason. There is no advance warning , it just happens.
TL* THE CONTACT OWNED A 2015 GMC DENALI. THE CONTACT STATED THAT WHILE THEIR HUSBAND WAS DRIVING APPROXIMATELY 45 MPH, WHEN THE TRAFFIC CAME TO A SUDDEN STOP CAUSING THE CONTACT TO APPLY THE BRAKES TO THE VEHICLE. THE DRIVER HAD TO DEPRESS THE BRAKING PEDAL EXCESSIVELY, HOWEVER, THE BRAKES DID NOT STOP AND THE BRAKES WERE FLOORED. THE VEHICLE ENDED UP REAR ENDING THE VEHICLE IN FRONT. THE AIR BAGS DID DEPLOY. THE VEHICLE WAS TOWED AND TOTALED. A POLICE REPORT WAS FILED. THE PASSENGER RECEIVED INJURIES TO THE CHEST AND LOWER ABDOMEN AREA. THE ONLY MEDICAL ATTENTION RECEIVED WAS BY EMT AT TIME OF THE CRASH. THE DEALER (CARDINALE GMC 2 HEITZINGER PLAZA, SEASIDE, CA 93955, (831) 322-4112) WAS MADE AWARE. THE CONTACT STATED THEY RECEIVED A NOTICE REGARDING THEIR VEHICLE HAVING ANTI-LOCK BRAKING ISSUES AFTER THE CRASH HAD OCCURRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 73,000. THE VIN WAS NOT AVAILABLE. *LN*DT*DT*JB THE CONSUMER PROVIDED PHOTOS. *TR
ISSUE # 1-THE WIPER BLADES STOPPED WORKING DURING A RAIN STORM AND WERE STUCK MIDWAY ON THE WINDSHIELD RIGHT IN MY SITE LINE WHILE ON O LONG 9 HOUR TRIP. I CHECKED THE ENGINE COMPARTMENT AREA AFTER STOPPING THE VEHICLE IN A SAFE AREA. THE TURNED ON THE WIPER CONTROL INSIDE THE CAR AND COULD HEAR THE MOTOR BUT NO VIPER MOVEMENT OCCURRED. THE CONTROL UNIT FOR THE WIPERS SEEMED TO BE INACCESSIBLE AS THERE IS A LARGE SEALED HOUSING OVER THE AREA COVERING THE WIPER MOTOR SO I WAS UNABLE TO ACCESS OR TRY TO REPAIR MYSELF. I WAITED OUT THE STORM AND RESEARCHED TO FIND THAT THE 2013 MODEL TERRAIN HAD A RECALL FOR THIS EXACT ISSUE IN THE UNITED STATES AND THAT MY MODEL YEAR CAR OF 2015 HAS HAD THE SAME RECALL IN CANADA ONLY EVEN THOUGH THERE ARE SEVERAL HUNDRED REPORTED CASES IN THE US PER CONSUMER REPORTS. MY HOPE IS A RECALL FOR FULL REPAIR OF THE ISSUE WILL OCCUR IMMEDIATELY IN THE US AS THIS IS A MAJOR SAFETY ISSUE THAT COULD RESULT IN SERIOUS INJURY OR EVEN DEATH SHOULD THIS DEFECT NOT BE RECALLED FOR REPAIR. ISSUE #2- THE FRONT BRAKES ON MY 2015 TERRAIN WILL LIE HAVE TO REPLACED FOR THE 3RD TIME IN A 4 MONTH PERIOD. THE BREAKS SHAKE AND SHIMMY THE FRONT END OF THE VEHICLE WHEN THEY ARE APPLIED CAUSING INEFFECTIVE BREAKING. BOTH THE BREAK PADS AND ROTORS WERE REPLACED TWICE AND THE LEFT FROM WHEEL BEARING HAS ALSO BEEN REPLACED WITH THE 2ND WHEEL BEARING NEEDING REPLACEMENT IN THE VERY NEAR FUTURE. THESES REPAIRS ALONE HAVE COST ME $1300. THE AUTO SHOP DID COVER THE 2ND BRAKE AND ROTOR REPAIR AND WILL FIND OUT SHORTLY IF THEY WILL COVER THE 3RD REPAIR. THIS IS ANOTHER CRUCIAL SAFETY ISSUE FOR THIS CAR THAT IS A VITAL PART OF MY DAILY COMMUTE TO AND FROM WORK. MY HOPE IS YOU WILL TAKE BOTH THESE SAFETY ISSUE SERIOUS AND ISSUE RECALLS.
STEERING TO THE LEFT, BUT NOT ALWAYS, THERE IS A SQUEALING NOISE. CONTINUES TO SQUEAL DRIVING STRAIGHT AND THEN STOPS. IT IS INTERMITTENT SO WHEN BROUGHT TO MY MECHANIC, HE COULDN'T RESOLVE. CHARGED ME NOTHING. DIDN'T DO IT FOR A DAY AND THEN I RECEIVED A NOTIFICATION FROM ONSTAR THAT THERE WAS AN ISSUE WITH MY ABS SYSTEM AND A SECOND NOTIFICATION THAT STABILITRAK SYSTEM HAD AN ISSUE. IT IS VERY LOUD AT TIMES. I ALSO HAVE A SQUEALING NOISE COMING FROM THE STEERING WHEEL AND THAT IS INTERMITTENT ALSO.
SQUEALING SOUND, MOSTLY AFTER TAKING A LEFT TURN, AS IF IT WERE COMING FROM LEFT REAR TIRE AND ALSO A SOUND COMING FROM STEERING WHEEL. NOTIFIED BY ONSTAR I MAY HAVE AN ISSUE WITH BOTH ABS SYSTEM OR STABILITRAK SYSTEM. SOUND IS INTERMITTENT SO WHEN I BROUGHT TO MY MECHANIC IT DID NOT MAKE THE SOUND SO HE COULD NOT DIAGNOSE WHERE IT WAS COMING FROM- NO CHARGE. ONE DAY LATER IT STARTED AGAIN. IT SOUNDS SCARY AND I HOPE NOTHING HAPPENS IF IT IS THE BRAKE SYSTEM. THIS IS WHY I SENT THIS COMPLAINT IN. THIS IS SECOND OF TWO COMPLAINTS BECAUSE IN THE FIRST, I FORGOT TO MENTION WHERE THE NOISE SOUNDED LIKE IT WAS COMING FROM.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026